CN110378787B - Method, device and system for decomposing transaction electric quantity - Google Patents

Method, device and system for decomposing transaction electric quantity Download PDF

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CN110378787B
CN110378787B CN201910565076.1A CN201910565076A CN110378787B CN 110378787 B CN110378787 B CN 110378787B CN 201910565076 A CN201910565076 A CN 201910565076A CN 110378787 B CN110378787 B CN 110378787B
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王文
曹荣章
丁恰
杨桂中
宋少群
涂孟夫
昌力
张彦涛
徐帆
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State Grid Corp of China SGCC
State Grid Fujian Electric Power Co Ltd
NARI Group Corp
Nari Technology Co Ltd
NARI Nanjing Control System Co Ltd
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State Grid Fujian Electric Power Co Ltd
NARI Group Corp
Nari Technology Co Ltd
NARI Nanjing Control System Co Ltd
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Abstract

The invention discloses a method, a device and a system for decomposing transaction electric quantity, which comprises the steps of calculating a transaction electric quantity decomposition curve of each hydraulic power plant based on the proportion of daily electric quantity and daily planned electric quantity planned by planned decomposition of each hydraulic power plant and a pre-generation planned curve of each hydraulic power plant; comparing the residual electric quantity and the power generation load rate of each new energy plant station at a certain moment with a set threshold, calculating a trading electric quantity decomposition curve of each new energy plant station at the moment based on a comparison result, and further calculating the trading electric quantity decomposition curve of each new energy plant station at each moment; and calculating the power generation space of the thermal power plant in each time period based on the trading power decomposition curve of each hydraulic power plant and the trading power decomposition curve of each new energy plant at each moment, and distributing the power generation space of the thermal power plant according to the equivalent remaining power generation hours of each thermal power plant. The method decomposes the hydropower, the new energy and the thermal power one by one, maximizes the utilization of the new energy power generation space, and generates new energy, thermal power and hydropower transaction decomposition curves by considering the load rate of the units of each power generation main body.

Description

Method, device and system for decomposing transaction electric quantity
Technical Field
The invention belongs to the technical field of decomposition of electric quantity for long-term trading in an electric power market, and particularly relates to a method, a device and a system for decomposing trading electric quantity.
Background
Due to uncertainty of power prediction and progressiveness of power reform, the current Chinese power market mainly adopts a mixed transaction mode of medium-long term power contract, day-ahead market and real-time market. The medium-long term electricity quantity contract trading can effectively help market members to control trading risk and stabilize supply on one hand, and can also provide guarantee for subsequent day-ahead market and real-time market full competition on the other hand. At present, medium-long term contracts signed by power generation enterprises and power grid companies are mostly electric quantity contracts, and the electric quantity contracts can be realized only by reasonably decomposing the electric quantity contracts. If the medium and long-term contract electric quantity is not reasonably decomposed, a series of problems of difficult execution, large deviation of completion rate, insufficient peak regulation capacity, insufficient day-ahead or real-time market competition, overlarge market force, severe fluctuation of real-time market price and the like can be caused. Therefore, scientifically and reasonably decomposing the contract electric quantity is an important guarantee for the safe and economic operation of the power system under the market background, and has important theoretical significance and practical application value.
With the continuous expansion of the access range of the electric power trade, the proportion of the new energy participating in the market trade is gradually improved, but because the new energy power generation has strong randomness, volatility and intermittency, the conflict between the clean energy consumption and the thermal power generation is continuously intensified. In order to ensure the full consumption of clean energy in a marketized environment, a reasonable medium-and-long-term trading electric quantity decomposition scheme needs to be designed by utilizing the power generation characteristic of new energy so as to ensure that the new energy fairly participates in market trading, a medium-and-long-term electric energy trading decomposition method for the prior consumption of the new energy is established, the power generation consumption proportion of the new energy is improved, and the wind and light abandoning rate is reduced.
The decomposition of medium and long term trading electric quantity is one of the main works of electric power trading centers of each power grid company, and the reasonable and scientific trading electric quantity decomposition method can greatly reduce the complexity of power grid dispatching and the price fluctuation of a real-time market on one hand, plays an important role in the fair competition of each power plant participating in the day-ahead market and the real-time market and the stability of the electric power market on the other hand; on the other hand, the proper decomposition mode can ensure that the new energy can fairly participate in market trading, the new energy power generation consumption proportion can be improved by preferentially reserving the new energy power generation space, and the wind and light abandoning rate of the system is reduced.
At present, many researches on aspects such as transaction modes, risk control, bidding mechanisms and the like of electric power transactions are carried out in China, but researches on decomposition problems of transaction electric quantity are relatively few, and the research contents of medium-term and long-term contract electric quantity decomposition do not consider the problem of consumption of new energy.
The invention discloses a Chinese patent application with publication number CN107845035A and the invention name is a decomposition settlement method for medium and long term electricity financial contracts in spot markets, which decomposes transaction electricity of medium and long term transactions into transaction electricity of each hour in equal proportion according to a uniform load curve of corresponding dates to obtain an hour time-sharing power curve of the day, namely an operation day time-sharing power curve. The specific process is as follows:
s1, acquiring information in medium and long-term transaction contracts;
s2, decomposing the medium and long term transaction electric quantity into the transaction electric quantity of each hour in equal proportion according to a uniformly adjusted load curve of a corresponding date;
s3, if n data points exist every day on the unified load curve corresponding to the date, the data point m = n/24 every hour;
s4, defining the average load size of the kth hour of a certain day d as follows:
Figure BDA0002109331030000021
wherein, P1, P2, \ 8230, pm is the load size of each data point;
s5, calculating the sum of the average load of S4, namely:
Figure BDA0002109331030000022
wherein the content of the first and second substances,
Figure BDA0002109331030000023
load data for each hour from 0 to 24 o' clock:
s6, defining a load ratio coefficient i k Comprises the following steps:
Figure BDA0002109331030000024
wherein the coefficient represents the ratio of the load at the kth hour to the load throughout the day;
s7, calculating daily hourly transaction electric quantity Q d,k The calculation formula is: q d,k ＝i k ×Q d Wherein Q is d The transaction electric quantity of a certain day d;
s8, calculating the daily hourly corresponding transaction electric quantity Q according to the step S6 d,1 ～Q d,24 And obtaining an hour-time-sharing power curve of the day, namely an operation day-time-sharing power curve.
It can be seen that the distribution difference of the load rates of the power generation main bodies of the existing trading electricity quantity decomposition technology is large, and a reasonable space cannot be provided for smooth development of the day-ahead market and the real-time market.
Disclosure of Invention
Aiming at the problems, the invention provides a method, a device and a system for decomposing transaction electric quantity, which decompose the transaction electric quantity one by one according to the sequence of water, electricity, new energy and thermal electricity, maximize the utilization of the new energy power generation space, and generate new energy, thermal electricity and water and electricity transaction decomposition curves by considering the load rate of each power generation main body unit.
In order to achieve the technical purpose and achieve the technical effects, the invention is realized by the following technical scheme:
in a first aspect, the present invention provides a method for decomposing transaction electric quantity, including:
calculating a trading electric quantity decomposition curve of each hydraulic power plant based on the ratio of planned decomposition daily electric quantity of each hydraulic power plant to planned daily electric quantity and a pre-power generation planned curve of each hydraulic power plant;
comparing the residual electric quantity and the power generation load rate of each new energy plant station at a certain moment with a set threshold, calculating a trading electric quantity decomposition curve of each new energy plant station at the moment based on a comparison result, and further calculating the trading electric quantity decomposition curve of each new energy plant station at each moment;
and calculating the power generation space of the thermal power plant in each time period based on the trading electric quantity decomposition curve of each hydraulic power plant and the trading electric quantity decomposition curve of each new energy plant at each moment, and then distributing the power generation space of the thermal power plant according to the equivalent remaining power generation hours of each thermal power plant to obtain the trading electric quantity decomposition curve of each thermal power plant.
Preferably, the calculation formula of the trade electric quantity decomposition curve of each hydraulic power plant is specifically:
Figure BDA0002109331030000031
in the formula (I), the compound is shown in the specification,
Figure BDA0002109331030000032
shows the pre-generation planning curve of each hydraulic power plant,
Figure BDA0002109331030000033
representing the planned daily power split of each hydroelectric plant,
Figure BDA0002109331030000034
representing the daily planned electrical capacity of the hydroelectric power plant i.
Preferably, the residual electric quantity and the power generation load rate of each new energy plant station at a certain moment are compared with a set threshold, and a transaction electric quantity decomposition curve of each new energy plant station at the moment is calculated based on a comparison result, specifically:
if the monthly residual electric quantity of the new energy plant station is equal to 0, setting a transaction electric quantity decomposition curve of the new energy plant station to be zero;
if the power generation load rate of the new energy plant station is greater than or equal to a set threshold value and the predicted value of the power generation power of the new energy plant station is greater than the installed capacity of a set proportion, the predicted output of the new energy plant station is obtained by the trade electric quantity decomposition curve of the new energy plant station;
and if the power generation load rate of the new energy plant station is greater than or equal to a set threshold value and the predicted value of the power generation power of the new energy plant station is smaller than the installed capacity of a set proportion, the trade electric quantity decomposition curve of the new energy plant station is the installed capacity of the new energy plant station of the set proportion.
Preferably, the comparing the remaining power and the power generation load rate of each new energy plant station at a certain time with a set threshold, and calculating a trade power decomposition curve of each new energy plant station at the certain time based on the comparison result, further includes:
calculating the total allocable power generation space of the new energy plant at a certain moment;
calculating the residual allocable power generation space of the new energy plant station based on the total allocable power generation space of the new energy plant station at a certain moment and the plan allocated in advance;
calculating to obtain a primary distribution plan of the new energy plant station based on the residual allocable power generation space of the new energy plant station;
calculating the residual power generation space of the new energy and the electric quantity abandoned by the primary distribution plan of the new energy station at the moment based on the primary distribution plan of the new energy station;
calculating a secondary distribution plan of the new energy plant station based on the residual power generation space of the new energy and the electric quantity abandoned by the primary distribution plan of the new energy plant station at a certain time;
and obtaining a trading electric quantity decomposition curve of each new energy plant station at the moment based on the primary distribution plan and the secondary distribution plan.
Preferably, the calculation formula of the total allocable power generation space of the new energy plant at a certain moment is as follows:
Figure BDA0002109331030000041
in the formula, S N,sum (t) is the total allocable power generation space of the new energy plant station at a certain moment, P load (t) short term load forecast for each new energy plant, P line (t) a tie line plan for each thermal power plant,
Figure BDA0002109331030000042
represents a breakdown plan for all the hydraulic power plants, wi represents a set of all the hydraulic power plants,
Figure BDA0002109331030000043
represents the sum of the thermal power minimum technology outputs, and Ti represents the set of all thermal power plants.
Preferably, the calculation formula of the remaining allocable power generation space of the new energy plant station is as follows:
Figure BDA0002109331030000044
in the formula, S N,remain Generating space, S, can be distributed for the rest of the new energy plant N,sum (t) the power generation space of the new energy plant station can be always distributed at a certain time,
Figure BDA0002109331030000045
representing the new energy plant station trade electric quantity decomposition plan with the power generation load rate more than or equal to the set threshold value M,
Figure BDA0002109331030000046
the trade electric quantity score of the new energy plant station indicating that the power generation load rate is larger than or equal to the set threshold value MSum of solution plans.
Preferably, the calculation formula of the primary distribution plan of the new energy plant station is as follows:
Figure BDA0002109331030000047
in the formula (I), the compound is shown in the specification,
Figure BDA0002109331030000048
for the primary distribution plan of the new energy plant, S N,remain The power generation space can be distributed for the rest of the new energy plant,
Figure BDA0002109331030000049
ri represents a new energy plant station set as the sum of the power generation power predictions of the new energy plant station i,
Figure BDA00021093310300000410
the monthly residual electric quantity of the new energy plant station i is obtained.
Preferably, the calculation formula of the new energy surplus power generation space is as follows:
Figure BDA0002109331030000051
in the formula, S N,remianspace (t) is the residual power generation space of new energy, S N,remain The power generation space can be distributed for the rest of the new energy plant,
Figure BDA0002109331030000052
a primary distribution plan for a new energy plant station is given;
the calculation formula of the electric quantity abandoned due to the primary distribution plan at the moment of the new energy plant station is as follows:
Figure BDA0002109331030000053
in the formula (I), the compound is shown in the specification,
Figure BDA0002109331030000054
in order to discard the electric quantity,
Figure BDA0002109331030000055
and predicting the sum of the generated power of the new energy plant station i.
Preferably, the calculation formula of the secondary distribution plan of the new energy plant station is as follows:
Figure BDA0002109331030000056
in the formula (I), the compound is shown in the specification,
Figure BDA0002109331030000057
plan for secondary distribution of new energy plant station, S N,remianspace (t) is the residual power generation space of the new energy,
Figure BDA0002109331030000058
the power is discarded.
Preferably, the calculation formula of the trade electric quantity decomposition curve at the moment of the new energy plant station is as follows:
Figure BDA0002109331030000059
in the formula (I), the compound is shown in the specification,
Figure BDA00021093310300000510
a plan for the primary distribution of the new energy plant station,
Figure BDA00021093310300000511
and (5) planning secondary distribution of the new energy station.
Preferably, the calculating of the transaction electric quantity decomposition curve of each new energy plant station at each moment specifically includes:
by means of rolling calculation, based on formula
Figure BDA00021093310300000512
Obtaining new energy plants at each momentA transaction power decomposition curve.
Preferably, the calculation formula of the power generation space of the thermal power plant in each time interval is as follows:
Figure BDA00021093310300000513
in the formula (I), the compound is shown in the specification,
Figure BDA00021093310300000514
for the power generation space, P, of the thermal power plant i at each time interval load (t) short term load forecast for each new energy plant, P line (t) plan for each thermal power plant's tie line, wi represents the aggregate of all the hydraulic power plants,
Figure BDA00021093310300000515
is a trade electric quantity decomposition curve of a hydropower plant i, ni represents the set of all new energy plant stations,
Figure BDA00021093310300000516
and (4) a transaction electric quantity decomposition curve of the new energy plant station i at the moment t.
Preferably, the calculation formula of the equivalent remaining generation hours of each thermal power plant is as follows:
Figure BDA00021093310300000517
Figure BDA00021093310300000518
in the formula (I), the compound is shown in the specification,
Figure BDA0002109331030000061
representing the equivalent remaining generation hours of the thermal power plant i,
Figure BDA0002109331030000062
representing monthly residual power production, cap, of the thermal power plant i i Is the installed capacity of the new energy plant station i,
Figure BDA0002109331030000063
indicating the number of boot-up days remaining in the month,
Figure BDA0002109331030000064
indicating the number of calendar days remaining in the month, U i (t) represents an i-month start-stop state of the thermal power plant.
Preferably, the calculation formula of the transaction electric quantity decomposition curve of each thermal power plant is as follows:
Figure BDA0002109331030000065
in the formula (I), the compound is shown in the specification,
Figure BDA0002109331030000066
for the period i the power generation space of the thermal power plant,
Figure BDA0002109331030000067
the equivalent remaining generating hours of the thermal power plant i are indicated, and Ti indicates all the thermal power plants.
In a second aspect, the present invention provides a trade power decomposition device, including:
the first calculation module is used for calculating a trading electric quantity decomposition curve of each hydraulic power plant based on the proportion of the planned decomposition daily electric quantity of each hydraulic power plant and the planned daily electric quantity and the pre-generation planned curve of each hydraulic power plant;
the second calculation module is used for comparing the monthly residual electric quantity and the power generation load rate of each new energy plant station at a certain moment with a set threshold value, calculating a transaction electric quantity decomposition curve of each new energy plant station at the moment based on a comparison result, and further calculating the transaction electric quantity decomposition curve of each new energy plant station at each moment;
and the third calculation module is used for calculating the power generation space of the thermal power plant in each time interval based on the trading electric quantity decomposition curve of each hydraulic power plant and the trading electric quantity decomposition curve of each new energy plant at each moment, and then distributing the power generation space of the thermal power plant according to the equivalent remaining power generation hours of each thermal power plant to obtain the trading electric quantity decomposition curve of each thermal power plant.
In a third aspect, the present invention provides a system for decomposing transaction power, including:
a processor adapted to implement instructions; and
a storage device adapted to store a plurality of instructions adapted to be loaded by a processor and to perform the steps of any of the first aspects.
Compared with the prior art, the invention has the following beneficial effects:
in order to ensure the power generation fairness of the units of each power generation main body and ensure that the power generation utilization rate of each power plant is arranged to be as consistent as possible, firstly, aiming at a new energy plant station, the new energy plant station with the power generation load rate of more than 30% is preferentially processed in the decomposition process, a plant station distribution plan is added, and meanwhile, the new energy power generation space is distributed according to the monthly residual electric quantity proportion of the new energy plant station; aiming at the plan of the thermal power plant, the thermal power generation space is distributed according to the equivalent remaining power generation hours of each thermal power, a trading electric quantity decomposition curve is generated, and the power generation fairness of each power generation main body is ensured.
In order to take the new energy consumption problem into consideration in the transaction electric quantity decomposition, the hydropower-new energy-thermal power is decomposed one by one, the new energy is decomposed by thermal power preferentially, and the utilization rate of a new energy power generation space is improved; in addition, after the new energy plant is subjected to primary decomposition, the proportion of the electric power abandonment caused by the new energy plant is redistributed so as to reduce the wind/light abandonment rate of the new energy.
Drawings
In order that the present disclosure may be more readily and clearly understood, reference is now made to the following detailed description of the present disclosure taken in conjunction with the accompanying drawings, in which:
fig. 1 is a flowchart illustrating a method for decomposing transaction power according to an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the scope of the invention.
The following detailed description of the principles of the invention is provided in connection with the accompanying drawings.
Example 1
As shown in fig. 1, an embodiment of the present invention provides a method for decomposing transaction power, including the following steps:
step (1) calculating a trading electric quantity decomposition curve of each hydraulic power plant based on the proportion of the planned decomposition daily electric quantity of each hydraulic power plant and the planned daily electric quantity and the pre-generation planned curve of each hydraulic power plant;
in a specific implementation manner of the embodiment of the present invention, the calculation formula of the trade electric quantity decomposition curve of each hydraulic power plant is specifically:
Figure BDA0002109331030000071
in the formula (I), the compound is shown in the specification,
Figure BDA0002109331030000072
shows the pre-generation planning curve of each hydraulic power plant,
Figure BDA0002109331030000073
representing the daily electric quantity planned to be decomposed by each hydraulic power plant,
Figure BDA0002109331030000074
representing the daily planned electrical quantity of the hydroelectric power plant i.
Comparing the residual electric quantity and the power generation load rate of each new energy plant station at a certain moment with a set threshold, calculating a transaction electric quantity decomposition curve of each new energy plant station at the moment based on a comparison result, and further calculating the transaction electric quantity decomposition curve of each new energy plant station at each moment;
in a specific implementation manner of the embodiment of the present invention, the step (2) specifically includes the following steps:
case 1: if the monthly residual electric quantity of the new energy plant station is equal to 0, setting a trade electric quantity decomposition curve of the new energy plant station to be zero; the calculation formula of the monthly residual electric quantity of the new energy plant station specifically comprises the following steps:
Figure BDA0002109331030000075
in the formula (I), the compound is shown in the specification,
Figure BDA0002109331030000076
the decomposed electricity quantity from the first day of the month to D +1,
Figure BDA0002109331030000077
indicating that the new energy plant station decomposes the electric quantity from the initial moment to the current moment;
Figure BDA0002109331030000078
representing monthly transaction electric quantity of the new energy plant station;
case 2: if the power generation load rate of the new energy plant station is greater than or equal to a set threshold value and the predicted value of the power generation power of the new energy plant station is greater than the installed capacity of a set proportion, the predicted output of the new energy plant station is obtained by the trade electric quantity decomposition curve of the new energy plant station; the set threshold may be selected to be 30%, which is determined according to a theoretical power and output characteristic curve of the new energy, the set proportion may be selected to be 30%, and the calculation formula of the power generation load rate of the new energy plant station is as follows:
Figure BDA0002109331030000081
in the formula (I), the compound is shown in the specification,
Figure BDA0002109331030000082
for the generating load rate, cap, of the new energy plant i Is the installed capacity, T, of the new energy plant station i remain The residual time of the month of the new energy plant station i;
case 3: if the power generation load rate of the new energy plant station is greater than or equal to a set threshold value and the predicted value of the power generation power of the new energy plant station is smaller than the installed capacity of a set proportion, the trade electric quantity decomposition curve of the new energy plant station is the installed capacity of the new energy plant station of the set proportion; in the practical application process, the set threshold value can be selected to be 30%, which is determined according to the theoretical power and output characteristic curve of the new energy; the set ratio may be selected to be 30%;
the calculation of the transaction electric quantity decomposition curve of each new energy plant at each moment specifically comprises the following steps:
by means of rolling calculation, based on formula
Figure BDA0002109331030000083
And obtaining a transaction electric quantity decomposition curve of each new energy plant station at each moment.
Step (3) calculating power generation spaces of the thermal power plants in each time period based on the trading electric quantity decomposition curves of the hydraulic power plants and the trading electric quantity decomposition curves of the new energy plant stations at each moment, and then distributing the power generation spaces of the thermal power plants according to the equivalent remaining power generation hours of the thermal power plants to obtain the trading electric quantity decomposition curves of the thermal power plants;
in a specific implementation manner of the embodiment of the present invention, the calculation formula of the power generation space of the thermal power plant at each time interval is:
Figure BDA0002109331030000084
in the formula (I), the compound is shown in the specification,
Figure BDA0002109331030000085
for the power generation space, P, of the thermal power plant i at each time interval load (t) short term load forecast for each new energy plant, P line (t) plan for each thermal power plant's tie line, wi represents the aggregate of all the hydraulic power plants,
Figure BDA0002109331030000086
for the trade electric quantity decomposition curve of each hydraulic power plant i, ni represents the set of all new energy plant stations,
Figure BDA0002109331030000087
for each time tA trade electric quantity decomposition curve of the new energy plant station i;
the calculation formula of the equivalent remaining generating hours of each thermal power plant is as follows:
Figure BDA0002109331030000088
Figure BDA0002109331030000089
in the formula (I), the compound is shown in the specification,
Figure BDA00021093310300000810
representing the equivalent remaining generation hours of the thermal power plant i,
Figure BDA00021093310300000811
representing monthly residual power production, cap, of the thermal power plant i i Is the installed capacity of the new energy plant station i,
Figure BDA0002109331030000091
indicating the number of boot-up days remaining in the month,
Figure BDA0002109331030000092
indicating the number of calendar days remaining in the month, U i (t) represents the monthly start-up and shut-down state of each thermal power plant;
the calculation formula of the transaction electric quantity decomposition curve of each thermal power plant is as follows:
Figure BDA0002109331030000093
in the formula (I), the compound is shown in the specification,
Figure BDA0002109331030000094
for the power generation space of the thermal power plant in each time period,
Figure BDA0002109331030000095
represents the equivalent remaining power generation hours of the thermal power plant iAnd T denotes all thermal power plants.
In conclusion, the method for decomposing the transaction electric quantity comprehensively considers the power generation characteristics of the new energy, the hydropower and the thermal power, decomposes the new energy, the hydropower and the thermal power one by one, and maximizes the new energy power generation space; meanwhile, in order to provide reasonable power generation space for stable operation of the day-ahead and real-time markets, the load rate of the units of each power generation main body is considered, and therefore new energy, thermal power and hydropower trading decomposition curves are generated.
Example 2
The difference between embodiment 1 of the present invention and embodiment 1 is that:
comparing the monthly residual electric quantity and the power generation load rate of each new energy plant station at a certain moment with a set threshold value, and calculating a transaction electric quantity decomposition curve of each new energy plant station at the moment based on a comparison result, wherein the method further comprises the following steps of 4: the case 4 is any case other than the cases 1 to 3, and specifically includes:
calculating the total allocable power generation space of the new energy plant at a certain moment;
calculating the residual allocable power generation space of the new energy plant station based on the total allocable power generation space of the new energy plant station at a certain moment and a plan which is allocated in advance;
calculating to obtain a primary distribution plan of the new energy plant station based on the residual allocable power generation space of the new energy plant station;
calculating the residual power generation space of the new energy and the electric quantity abandoned by the primary distribution plan of the new energy plant station at the moment based on the primary distribution plan of the new energy plant station;
calculating a secondary distribution plan of the new energy plant station based on the residual power generation space of the new energy and the electric quantity abandoned by the primary distribution plan of the new energy plant station at a certain time;
and obtaining a trading electric quantity decomposition curve of each new energy plant station at the moment based on the primary distribution plan and the secondary distribution plan.
The calculation formula of the total allocable power generation space of the new energy plant station at a certain moment is as follows:
Figure BDA0002109331030000096
in the formula, S N,sum (t) is the total allocable power generation space of the new energy plant station at a certain moment, P load (t) short term load forecast for each new energy plant, P line (t) a tie line plan for each thermal power plant,
Figure BDA0002109331030000101
represents the breakdown plan of all the hydraulic power plants, wi represents the number of all the hydraulic power plants,
Figure BDA0002109331030000102
and the sum of the minimum technical output of thermal power is shown, and Ti represents the number of all thermal power plants.
The calculation formula of the residual distributable power generation space of the new energy plant station is as follows:
Figure BDA0002109331030000103
in the formula, S N,remain Can distribute power generation space S for the rest of new energy plant N,sum (t) the power generation space of the new energy plant station can be always distributed at a certain time,
Figure BDA0002109331030000104
representing the new energy plant station trade electric quantity decomposition plan with the power generation load rate more than or equal to the set threshold value M,
Figure BDA0002109331030000105
and the sum of the trading electric quantity decomposition plans of the new energy plant station is represented, wherein the power generation load rate is greater than or equal to a set threshold value M.
The calculation formula of the primary distribution plan of the new energy plant station is as follows:
Figure BDA0002109331030000106
in the formula (I), the compound is shown in the specification,
Figure BDA0002109331030000107
for the primary distribution plan of the new energy plant, S N,remain The power generation space can be distributed for the rest of the new energy plant,
Figure BDA0002109331030000108
ri represents a new energy plant station set as the sum of the power generation power predictions of the new energy plant station i,
Figure BDA0002109331030000109
the monthly residual electric quantity of the new energy plant station i.
The calculation formula of the new energy surplus power generation space is as follows:
Figure BDA00021093310300001010
in the formula, S N,remianspace (t) is the residual power generation space of new energy, S N,remain The power generation space can be distributed for the rest of the new energy plant,
Figure BDA00021093310300001011
a primary distribution plan for a new energy plant station is given;
the calculation formula of the electric quantity abandoned due to the primary distribution plan at the moment of the new energy plant station is as follows:
Figure BDA00021093310300001012
in the formula (I), the compound is shown in the specification,
Figure BDA00021093310300001013
in order to discard the electric quantity,
Figure BDA00021093310300001014
and predicting the sum of the generated power of the new energy plant station i.
The calculation formula of the secondary distribution plan of the new energy plant station is as follows:
Figure BDA00021093310300001015
in the formula (I), the compound is shown in the specification,
Figure BDA00021093310300001016
for secondary distribution plan of new energy plant station, S N,remianspace (t) is the residual power generation space of the new energy,
Figure BDA0002109331030000111
the power is discarded.
The calculation formula of the new energy plant station trading electric quantity decomposition curve at the moment is as follows:
Figure BDA0002109331030000112
in the formula (I), the compound is shown in the specification,
Figure BDA0002109331030000113
a plan for the primary distribution of the new energy plant station,
Figure BDA0002109331030000114
and (5) planning secondary distribution of the new energy station.
Example 3
Based on the same inventive concept as embodiment 1, an embodiment of the present invention provides a trade power decomposition device, including:
the first calculation module is used for calculating a trading electric quantity decomposition curve of each hydraulic power plant based on the proportion of the planned decomposition daily electric quantity of each hydraulic power plant to the planned daily electric quantity and the pre-generation planned curve of each hydraulic power plant;
the second calculation module is used for comparing the monthly residual electric quantity and the power generation load rate of each new energy plant station at a certain moment with a set threshold, calculating a trading electric quantity decomposition curve of each new energy plant station at the moment based on a comparison result, and further calculating the trading electric quantity decomposition curve of each new energy plant station at each moment;
and the third calculation module is used for calculating power generation spaces of the thermal power plants in each time period based on the trading electric quantity decomposition curves of the hydraulic power plants and the trading electric quantity decomposition curves of the new energy plants at each moment, and then distributing the power generation spaces of the thermal power plants according to equivalent remaining power generation hours of the thermal power plants to obtain the trading electric quantity decomposition curves of the thermal power plants.
The calculation formula of the transaction electric quantity decomposition curve of each hydraulic power plant is specifically as follows:
Figure BDA0002109331030000115
in the formula (I), the compound is shown in the specification,
Figure BDA0002109331030000116
shows the pre-generation planning curve of each hydraulic power plant,
Figure BDA0002109331030000117
representing the daily electric quantity planned to be decomposed by each hydraulic power plant,
Figure BDA0002109331030000118
representing the daily planned electric quantity of the D +2 day hydroelectric plant i.
In a specific implementation manner of the embodiment of the present invention, the step (2) specifically includes the following steps:
case 1: if the monthly residual electric quantity of the new energy plant station is equal to 0, setting a trade electric quantity decomposition curve of the new energy plant station to be zero; the calculation formula of the monthly residual electric quantity of the new energy plant station specifically comprises the following steps:
Figure BDA0002109331030000119
in the formula (I), the compound is shown in the specification,
Figure BDA00021093310300001110
the decomposed electricity quantity from the first day of the month to D +1,
Figure BDA00021093310300001111
indicating that the new energy plant station decomposes the electric quantity from the initial moment to the current moment;
Figure BDA00021093310300001112
representing monthly transaction electric quantity of the new energy plant station;
case 2: if the power generation load rate of the new energy plant station is greater than or equal to a set threshold value and the predicted value of the power generation power of the new energy plant station is greater than the installed capacity of a set proportion, the predicted output of the new energy plant station is obtained by the trade electric quantity decomposition curve of the new energy plant station; the calculation formula of the power generation load rate of the new energy plant station is as follows:
Figure BDA0002109331030000121
in the formula (I), the compound is shown in the specification,
Figure BDA0002109331030000122
for the generating load rate, cap, of the new energy plant i Is the installed capacity, T, of the new energy plant station i remain The residual time of the month of the new energy plant station i;
case 3: if the power generation load rate of the new energy plant station is greater than or equal to a set threshold value and the predicted value of the power generation power of the new energy plant station is smaller than the installed capacity of a set proportion, the transaction electric quantity decomposition curve of the new energy plant station is the installed capacity of the new energy plant station of the set proportion; in the practical application process, the set threshold value can be selected to be 30%, which is determined according to the theoretical power and output characteristic curve of the new energy; the set ratio may be selected to be 30%;
case 4: the case 4 is any case other than the cases 1 to 3, and specifically includes:
calculating the total allocable power generation space of the new energy plant at a certain moment;
calculating the residual allocable power generation space of the new energy plant station based on the total allocable power generation space of the new energy plant station at a certain moment and the plan allocated in advance;
calculating to obtain a primary distribution plan of the new energy plant station based on the residual allocable power generation space of the new energy plant station;
calculating the residual power generation space of the new energy and the electric quantity abandoned by the primary distribution plan of the new energy plant station at the moment based on the primary distribution plan of the new energy plant station;
calculating a secondary distribution plan of the new energy plant station based on the residual power generation space of the new energy and the electric quantity discarded due to the primary distribution plan of the new energy plant station at a certain time;
and obtaining a trading electric quantity decomposition curve of each new energy plant station at the moment based on the primary distribution plan and the secondary distribution plan.
The calculation formula of the total allocable power generation space of the new energy plant station at a certain moment is as follows:
Figure BDA0002109331030000123
in the formula, S N,sum (t) is the total allocable power generation space of the new energy plant station at a certain moment, P load (t) short term load forecast for each new energy plant, P line (t) a tie line plan for each thermal power plant,
Figure BDA0002109331030000124
represents the breakdown plan of all the hydraulic power plants, wi represents the number of all the hydraulic power plants,
Figure BDA0002109331030000125
and the sum of the minimum technical output of thermal power is shown, and Ti represents the number of all thermal power plants.
The calculation formula of the residual allocable power generation space of the new energy plant station is as follows:
Figure BDA0002109331030000126
in the formula, S N,remain Generating space, S, can be distributed for the rest of the new energy plant N,sum (t) the power generation space of the new energy plant station can be always distributed at a certain time,
Figure BDA0002109331030000131
representing the new energy plant station trade electric quantity decomposition plan with the power generation load rate more than or equal to the set threshold value M,
Figure BDA0002109331030000132
and the sum of the trading electric quantity decomposition plans of the new energy plant station is represented, wherein the power generation load rate is greater than or equal to a set threshold value M.
The calculation formula of the primary distribution plan of the new energy plant station is as follows:
Figure BDA0002109331030000133
in the formula (I), the compound is shown in the specification,
Figure BDA0002109331030000134
plan for primary distribution of new energy plant station, S N,remain The power generation space can be distributed for the rest of the new energy plant station,
Figure BDA0002109331030000135
ri represents a new energy plant station set for predicting the sum of the generated power of the new energy plant station i,
Figure BDA0002109331030000136
the monthly residual electric quantity of the new energy plant station i.
The calculation formula of the new energy surplus power generation space is as follows:
Figure BDA0002109331030000137
in the formula, S N,remianspace (t) is the residual power generation space of new energy, S N,remain The power generation space can be distributed for the rest of the new energy plant,
Figure BDA0002109331030000138
a primary distribution plan for the new energy plant station;
the calculation formula of the electric quantity abandoned caused by the primary distribution plan at the moment of the new energy plant station is as follows:
Figure BDA0002109331030000139
in the formula (I), the compound is shown in the specification,
Figure BDA00021093310300001310
in order to discard the electric quantity,
Figure BDA00021093310300001311
and predicting the sum of the generated power of the new energy plant station i.
The calculation formula of the secondary distribution plan of the new energy plant station is as follows:
Figure BDA00021093310300001312
in the formula (I), the compound is shown in the specification,
Figure BDA00021093310300001313
plan for secondary distribution of new energy plant station, S N,remianspace (t) is the residual power generation space of the new energy,
Figure BDA00021093310300001314
the power is discarded.
The calculation formula of the new energy plant station trading electric quantity decomposition curve at the moment is as follows:
Figure BDA00021093310300001315
in the formula (I), the compound is shown in the specification,
Figure BDA00021093310300001316
a plan is allocated for the first time of the new energy station,
Figure BDA00021093310300001317
and (5) planning secondary distribution of the new energy station.
The calculation of the transaction electric quantity decomposition curve of each new energy plant at each moment specifically comprises the following steps:
by means of rolling calculation, based on formula
Figure BDA00021093310300001318
And obtaining a transaction electric quantity decomposition curve of each new energy plant station at each moment.
The calculation formula of the power generation space of the thermal power plant in each time period is as follows:
Figure BDA0002109331030000141
in the formula (I), the compound is shown in the specification,
Figure BDA0002109331030000142
for the power generation space, P, of the thermal power plant i at each time interval load (t) short term load forecast for each new energy plant, P line (t) a tie plan for each thermal power plant, wi representing the aggregate of all the power plants,
Figure BDA0002109331030000143
for the transaction electric quantity decomposition curve of each hydraulic power plant i, ni represents the set of all new energy plant stations,
Figure BDA0002109331030000144
and (4) a transaction electric quantity decomposition curve of each new energy plant station i at the moment t.
The calculation formula of the equivalent remaining generating hours of each thermal power plant is as follows:
Figure BDA0002109331030000145
Figure BDA0002109331030000146
in the formula (I), the compound is shown in the specification,
Figure BDA0002109331030000147
representing the equivalent remaining generation hours of the thermal power plant i,
Figure BDA0002109331030000148
representing monthly residual power production, cap, of the thermal power plant i i Is the installed capacity of the new energy plant station i,
Figure BDA0002109331030000149
indicating the number of boot-up days remaining in the month,
Figure BDA00021093310300001410
indicating the number of calendar days remaining in the month, U i (t) represents a monthly startup/shutdown state of each thermal power plant.
The calculation formula of the transaction electric quantity decomposition curve of each thermal power plant is as follows:
Figure BDA00021093310300001411
in the formula (I), the compound is shown in the specification,
Figure BDA00021093310300001412
is a power generation space of a thermal power plant in each time period,
Figure BDA00021093310300001413
the equivalent remaining power generation hours of the thermal power plant i is represented, and Ti represents all the thermal power plants.
Example 4
Based on the same inventive concept as embodiment 1, an embodiment of the present invention provides a system for decomposing transaction electric quantity, including:
a processor adapted to implement instructions; and
a storage device adapted to store a plurality of instructions adapted to be loaded and executed by a processor to perform the steps of any of embodiments 1 or 2.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, and such changes and modifications are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (14)

1. A method for decomposing transaction electricity quantity is characterized by comprising the following steps:
calculating a trading electric quantity decomposition curve of each hydraulic power plant based on the ratio of the planned decomposition daily electric quantity of each hydraulic power plant to the planned decomposition daily electric quantity of each hydraulic power plant and a pre-generation planned curve of each hydraulic power plant;
comparing the residual electric quantity and the power generation load rate of each new energy plant station at a certain moment with a set threshold, calculating a trading electric quantity decomposition curve of each new energy plant station at the moment based on a comparison result, and further calculating the trading electric quantity decomposition curve of each new energy plant station at each moment;
calculating power generation spaces of the thermal power plants at each time interval based on the trading electric quantity decomposition curves of the hydraulic power plants and the trading electric quantity decomposition curves of the new energy plant stations at each moment, and then distributing the power generation spaces of the thermal power plants according to the equivalent remaining power generation hours of the thermal power plants to obtain the trading electric quantity decomposition curves of the thermal power plants;
comparing the residual electric quantity and the power generation load rate of each new energy plant station at a certain moment with a set threshold value, and calculating a trading electric quantity decomposition curve of each new energy plant station at the moment based on a comparison result, wherein the comparison result specifically comprises the following steps:
if the monthly residual electric quantity of the new energy plant station is equal to 0, setting a trade electric quantity decomposition curve of the new energy plant station to be zero;
if the power generation load rate of the new energy plant station is greater than or equal to a set threshold value and the predicted value of the power generation power of the new energy plant station is greater than the installed capacity of a set proportion, the predicted output of the new energy plant station is obtained through a trade electric quantity decomposition curve of the new energy plant station;
if the power generation load rate of the new energy plant station is greater than or equal to a set threshold value and the predicted value of the power generation power of the new energy plant station is smaller than the installed capacity of a set proportion, the transaction electric quantity decomposition curve of the new energy plant station is the installed capacity of the new energy plant station of the set proportion;
the method comprises the following steps of comparing the residual electric quantity and the power generation load rate of each new energy plant station at a certain moment with a set threshold value, and calculating a transaction electric quantity decomposition curve of each new energy plant station at the moment based on a comparison result, and further comprises the following steps:
calculating the total allocable power generation space of the new energy plant at a certain moment;
calculating the residual allocable power generation space of the new energy plant station based on the total allocable power generation space of the new energy plant station at a certain moment and the plan allocated in advance;
calculating to obtain a primary distribution plan of the new energy plant station based on the residual distributable power generation space of the new energy plant station;
calculating the residual power generation space of the new energy and the electric quantity abandoned by the primary distribution plan of the new energy plant at the moment based on the primary distribution plan of the new energy plant;
calculating a secondary distribution plan of the new energy plant station based on the residual power generation space of the new energy and the electric quantity discarded due to a primary distribution plan of the new energy plant station at a certain time;
and obtaining a trading electric quantity decomposition curve of each new energy plant station at the moment based on the primary distribution plan and the secondary distribution plan.
2. The method of claim 1, wherein the method comprises: the calculation formula of the transaction electric quantity decomposition curve of each hydraulic power plant is specifically as follows:
Figure FDA0003743067740000021
in the formula (I), the compound is shown in the specification,
Figure FDA0003743067740000022
shows the pre-generation planning curve of each hydraulic power plant,
Figure FDA0003743067740000023
represents the planned daily power split of each hydroelectric power plant,
Figure FDA0003743067740000024
representing the daily planned electrical capacity of the hydroelectric power plant i.
3. The method of claim 1, wherein the method comprises: the calculation formula of the total allocable power generation space of the new energy plant station at a certain moment is as follows:
Figure FDA0003743067740000025
in the formula, S N,sum (t) is the total allocable power generation space of the new energy plant station at a certain moment, P load (t) short term load forecast for each new energy plant, P line (t) a tie line plan for each thermal power plant,
Figure FDA0003743067740000026
represents a breakdown plan for all the hydraulic power plants, wi represents a set of all the hydraulic power plants,
Figure FDA0003743067740000027
represents the sum of the thermal power minimum technology outputs, and Ti represents the set of all thermal power plants.
4. The method of claim 1, wherein the step of decomposing the transaction power comprises the steps of: the calculation formula of the residual allocable power generation space of the new energy plant station is as follows:
Figure FDA0003743067740000028
in the formula, S N,remain Can distribute power generation space S for the rest of new energy plant N,sum (t) the power generation space of the new energy plant station can be always distributed at a certain time,
Figure FDA0003743067740000029
representing a new energy plant trading electric quantity decomposition plan with the power generation load rate more than or equal to a set threshold value M,
Figure FDA00037430677400000210
and the sum of the trading electric quantity decomposition plans of the new energy plant station is represented, wherein the power generation load rate is greater than or equal to a set threshold value M.
5. The method of claim 1, wherein the step of decomposing the transaction power comprises the steps of: the calculation formula of the primary distribution plan of the new energy plant station is as follows:
Figure FDA00037430677400000211
in the formula (I), the compound is shown in the specification,
Figure FDA00037430677400000212
for the primary distribution plan of the new energy plant, S N,remain The power generation space can be distributed for the rest of the new energy plant,
Figure FDA00037430677400000213
ri represents a new energy plant station set as the sum of the power generation power predictions of the new energy plant station i,
Figure FDA00037430677400000214
the monthly residual electric quantity of the new energy plant station i is obtained.
6. The method of claim 1, wherein the method comprises: the calculation formula of the residual power generation space of the new energy is as follows:
Figure FDA0003743067740000031
in the formula, S N,remianspace (t) is the residual power generation space of new energy, S N,remain The power generation space can be distributed for the rest of the new energy plant station,
Figure FDA0003743067740000032
a primary distribution plan for the new energy plant station;
the calculation formula of the electric quantity abandoned due to the primary distribution plan at the moment of the new energy plant station is as follows:
Figure FDA0003743067740000033
in the formula (I), the compound is shown in the specification,
Figure FDA0003743067740000034
in order to discard the electric quantity,
Figure FDA0003743067740000035
and predicting the sum of the generated power of the new energy plant station i.
7. The method of claim 1, wherein the method comprises: the calculation formula of the secondary distribution plan of the new energy plant station is as follows:
Figure FDA0003743067740000036
in the formula (I), the compound is shown in the specification,
Figure FDA0003743067740000037
for secondary distribution plan of new energy plant station, S N,remianspace (t) is the residual power generation space of the new energy,
Figure FDA0003743067740000038
the power is discarded.
8. The method of claim 1, wherein the method comprises: the calculation formula of the new energy plant station trade electric quantity decomposition curve at the moment is as follows:
Figure FDA0003743067740000039
in the formula (I), the compound is shown in the specification,
Figure FDA00037430677400000310
a plan is allocated for the first time of the new energy station,
Figure FDA00037430677400000311
and (5) planning secondary distribution of the new energy station.
9. The method of claim 8, wherein the method comprises: the calculation of the transaction electric quantity decomposition curve of each new energy plant at each moment specifically comprises the following steps:
by means of rolling calculation, based on formula
Figure FDA00037430677400000312
And obtaining a transaction electric quantity decomposition curve of each new energy plant station at each moment.
10. The method of claim 1, wherein the step of decomposing the transaction power comprises the steps of: the calculation formula of the power generation space of the thermal power plant in each time period is as follows:
Figure FDA00037430677400000313
in the formula (I), the compound is shown in the specification,
Figure FDA00037430677400000314
for the power generation space, P, of the thermal power plant i at each time interval load (t) short term load forecast for each new energy plant, P line (t) a tie plan for each thermal power plant, wi representing the aggregate of all the power plants,
Figure FDA0003743067740000041
is a trade electric quantity decomposition curve of a hydropower plant i, ni represents the set of all new energy plant stations,
Figure FDA0003743067740000042
and (4) a transaction electric quantity decomposition curve of the new energy plant station i at the moment t.
11. The method of claim 1, wherein the method comprises: the calculation formula of the equivalent remaining generating hours of each thermal power plant is as follows:
Figure FDA0003743067740000043
Figure FDA0003743067740000044
in the formula (I), the compound is shown in the specification,
Figure FDA0003743067740000045
representing the equivalent remaining generation hours of the thermal power plant i,
Figure FDA0003743067740000046
representing monthly residual power production, cap, of the thermal power plant i i Is the installed capacity of the new energy plant station i,
Figure FDA0003743067740000047
indicating the number of boot-up days remaining in the month,
Figure FDA0003743067740000048
indicating the number of calendar days remaining in the month, U i (t) represents the i-month startup and shutdown state of the thermal power plant.
12. The method of claim 1, wherein the step of decomposing the transaction power comprises the steps of: the calculation formula of the transaction electric quantity decomposition curve of each thermal power plant is as follows:
Figure FDA0003743067740000049
in the formula (I), the compound is shown in the specification,
Figure FDA00037430677400000410
for the period i of the power generation space of the thermal power plant,
Figure FDA00037430677400000411
the equivalent remaining power generation hours of the thermal power plant i is represented, and Ti represents all the thermal power plants.
13. A transaction power decomposition device, comprising:
the first calculation module is used for calculating a trading electric quantity decomposition curve of each hydraulic power plant based on the proportion of the planned decomposition daily electric quantity of each hydraulic power plant to the planned daily electric quantity and the pre-generation planned curve of each hydraulic power plant;
the second calculation module is used for comparing the monthly residual electric quantity and the power generation load rate of each new energy plant station at a certain moment with a set threshold value, calculating a transaction electric quantity decomposition curve of each new energy plant station at the moment based on a comparison result, and further calculating the transaction electric quantity decomposition curve of each new energy plant station at each moment;
the third calculation module is used for calculating power generation spaces of the thermal power plants at all time intervals based on the trading electric quantity decomposition curves of all the hydraulic power plants and the trading electric quantity decomposition curves of all the new energy plant stations at all times, and then distributing the power generation spaces of the thermal power plants according to equivalent remaining power generation hours of all the thermal power plants to obtain the trading electric quantity decomposition curves of all the thermal power plants;
the method comprises the following steps of comparing the residual electric quantity and the power generation load rate of each new energy plant station at a certain moment with a set threshold value, and calculating a trading electric quantity decomposition curve of each new energy plant station at the moment based on a comparison result, wherein the comparison result specifically comprises the following steps:
if the monthly residual electric quantity of the new energy plant station is equal to 0, setting a trade electric quantity decomposition curve of the new energy plant station to be zero;
if the power generation load rate of the new energy plant station is greater than or equal to a set threshold value and the predicted value of the power generation power of the new energy plant station is greater than the installed capacity of a set proportion, the predicted output of the new energy plant station is obtained by the trade electric quantity decomposition curve of the new energy plant station;
if the power generation load rate of the new energy plant station is greater than or equal to a set threshold value and the predicted value of the power generation power of the new energy plant station is smaller than the installed capacity of a set proportion, the trade electric quantity decomposition curve of the new energy plant station is the installed capacity of the new energy plant station of the set proportion;
the method comprises the following steps of comparing the residual electric quantity and the power generation load rate of each new energy plant station at a certain moment with a set threshold value, and calculating a transaction electric quantity decomposition curve of each new energy plant station at the moment based on a comparison result, and further comprises the following steps:
calculating the total allocable power generation space of the new energy plant at a certain moment;
calculating the residual allocable power generation space of the new energy plant station based on the total allocable power generation space of the new energy plant station at a certain moment and the plan allocated in advance;
calculating to obtain a primary distribution plan of the new energy plant station based on the residual distributable power generation space of the new energy plant station;
calculating the residual power generation space of the new energy and the electric quantity abandoned by the primary distribution plan of the new energy station at the moment based on the primary distribution plan of the new energy station;
calculating a secondary distribution plan of the new energy plant station based on the residual power generation space of the new energy and the electric quantity discarded by the primary distribution plan of the new energy plant station at a certain time;
and obtaining a trading electric quantity decomposition curve of each new energy plant station at the moment based on the primary distribution plan and the secondary distribution plan.
14. A system for resolving transaction power, comprising:
a processor adapted to implement instructions; and
a storage device adapted to store a plurality of instructions adapted to be loaded by a processor and to perform the method of any of claims 1 to 12.
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